201212221211 has 8 divisors (see below), whose sum is σ = 201872559360. Its totient is φ = 200551995072.

The previous prime is 201212221201. The next prime is 201212221247. The reversal of 201212221211 is 112122212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201212221211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201212221211.

It is not an unprimeable number, because it can be changed into a prime (201212221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092550 + ... + 5131908.

It is an arithmetic number, because the mean of its divisors is an integer number (25234069920).

Almost surely, 2^201212221211 is an apocalyptic number.

201212221211 is a deficient number, since it is larger than the sum of its proper divisors (660338149).

201212221211 is a wasteful number, since it uses less digits than its factorization.

201212221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56005.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201212221211 its reverse (112122212102), we get a palindrome (313334433313).

The spelling of 201212221211 in words is "two hundred one billion, two hundred twelve million, two hundred twenty-one thousand, two hundred eleven".